Pneumatic tire valve



June 22 1926.

F. MYERS PNEUMATIC TIRE VALVE Filed Dec. 2, 1925 4a sprin o y valve w ch is substantially automatlc 1n 1ts Patented June 22, 1926:

Y .UNITED STATES PATENT OFFICE.

FREDERICK MYERS, OF NEW YORK, N. Y.

rNEUMArIc rmi: vALvn.

Application led December 2, 1925. vSerial No. 72,660.

loperate within the boreof the valve casing.

A further object of the invention is to provide a structure of the above ment1oned type, wherein the spring pressed valve member may be positioned w1th1n or removed from the bore ofthe casing without danger of damaging the said valve.

A still further object of the invent1on 1s to provide means for permitting rap1d de fla tion of a member equipped wlth thls 1mproved valve structure without removing the spring pressed, inflation and slowl deflatlon valve from its seat or from the -valve casing.

And a still further object of the invention is to provide atire valve structure which includes one element which is of a reversible, compound type, the said element bein adapted to function properly in either of t e two possible ositlons in which it may be assembled, an when in either pos1- tion, operates as a seat for the sprlng pre inflating and slow -deflating valve Aand as a valve for rapid deflating purposes.

Other ob'ects and advantages ofthe invention will be a parent during the course of the following escription.

In the accompanying drawing formin a part of this specification and in whlch ike numerals are employed to designate like parts throughout the same,

Fi ure 1 is a central, longitudinal, sectiona view of the pneumatic tire valve structure formed in accordance with this invention,

Figure 2 shows in plan view the various inde endent elements or units employed to buil up the complete valve structure and arran ed in the sequence in which they are assem led, and

Figure 3 is a central sectional view of a modified form of cap.

The principal structural features and the primary advantages yderived from the use of this valve may be briefly described as follows v The structure includes a suitable valve cas ing having a borewithin which is positioned ressed, lnfiation and slow defiatlon operation. Ihe casing is further provided wlth a port 1n one side thereof and adjacent its outer end which is'employed for the purppse of quickly deflating a pneumatic memr equip ed with this valve structure. i A compoun element of a reversible type is suitably connected to the outer end of the valve casin andl includes, at each end portion thereo a valve seat for the spring pressed v alve and a valve for controlling the ow of air through the casing port.Y A suitable'ca'p is provided for preventin'4 the admlsslon of foreign matter into tie valve structure and is suitably connected to the outer end of the reversible, compound element.

While this. tire valve will be very desirable and convenient for use by a tire owner, 1t 1s belleved that the tire manufacturer will derlve a greater benefit from the same; It

Vis believed unnecessary to enumerate any advantages the user of this structure will derive, but it is thought that a few of the advantages adhering to the manufacturer should be suggested.

To those who are familiar with the various steps performed in the manufacture of apneumatic tube for vehicle tires, it will be very apparent that a great deal of time and money may be saved during the testing of a completed tube for leaks. It is the custom for tube manufacturers to connect a valve structure to a tube and theninflate the tube so that it may be emersed in a tank of water .to test for valve leaks vand leaks around the point of connection between the tube and the valve casin If the Schrader type of valve is employe it becomes necessary entirely to remove the spring pressed valve element from the bore of the valve casing before the tube may be deflated and Vits seat or from the bore of the valve casing.

In the drawing, wherein for the purpose of illustration is shown a preferred embodiment of this invention, the numeral 5 desiglll' rates a valve casing of elongated formation which is externally screw threaded in thel ordinary manner for the purpose of accommodating the conventional rim clamping nut and valve casing cap, not shown. The casing is provided with an axially extending bore 6 which is provided with the two spaced shoulders 7 and 8 which are formed by twice increasing the. diameter of the bore 6. From the shoulder 8 to the outer cnd of the casing 5 the bore is internally screw threaded for a purpose to be disclosed as the description proceeds. A port 9 is formed in one side of the casing 5 and cominunicates with the casing bore adjacent the shoulder 8.

An annular seat 10, formed of any suitable material, is positioned upon the shoulder 8 and functions as a valve seat in a man-I ner to be disclosed at a later point.

A spring pressed, inflation and slow dellation valve unit is positioned within the bore of the casing 5 and includes a valve stem 11 which is flattened at its inner end 12 for retaining upon the stein the cup-like spring seat and stem guide 13 which is movable in respect to the stem. Suitabl secured to the stem, intermediate its en s, is a cup 14 which has ositioned therein a valve seat 15 which is ormed of a suitable, compressible material. Inter osed between the element 13 and the fixed e ement 14 is a spiral spring 16 which encircles the stem 11.

A compound element of a reversible type is threadedly connected to the louter end of the valve stem and it will be seen that the same may be cheaply and easily manufactured from hexagonal or olygonal stock. The compound element inc udes the wrench engaging portion 17 which is located intermediate the ends of the element, as clearl illustrated. Extending from the portion 1 to each end of the element are the reduced externally screw threaded portions 18. Formed within the bore of this element are the two valve seats 19 which face toward the opposite ends of the element. A suitable passage vor bore 20 is formed in this double valve portion.

A suitable cup-like cap 21 is provided and is internally screw threaded to be mounted upon the outer end of the compound member in the manner best illustrated in Figure 1.

eld inoperate ma`y be `described in detail as foling bore. The compound, reversible element.,

should then be threaded into the outer end of the casing until the inner end edge of the same engages the annular seat 10. The outer end of the valve stein 11 will have passed through the bore 20 formed in the double valve seat portion of the element and the valve seat 19 facing toward the inner end of the compound element will have been placed in engagement with the valve seat 15 to move the stem inwardly in respect to the element 13 for compressing the spring 16 to securely hold the valve 15 against its seat.

It will be noted that no care need be taken in respect to which end of the compound element should be threaded in the ore of the casing in view of the fact that both ends are identical. In inflating a tube equipped with this valve structure, the puin hose may be threaded or otherwise suita ly connected to the outer portion 18 of the compound element and air may then be forced through the bore of the casing. If it is desirable to permit the escape of a small portion of air, the outer extremity of the valve stem 11 may be engaged by any suitable means for forcing the valve 15 oil its cooperating seat 19. If it is desirable to permit the rapid escape of the air in a tube equipped with this valve structure, it is not necessary to retain the valve 15 o of its seat until the tube is entirely deflated, nor is it necessary to remove the valve 15 from its seat to any extent. The deflating operation may be performed by partially loosening or backing out the compound element in respect to the end of the casing so that the inner end edge of the compound Aelement will be removed from the valve seat 10 and the port 9 o ened. 1

nother novel advantage owing from the use of this valve structure is the possibility of permtting an air pressure measuring instrument to be used while delating a too highly inated tire, for registering the fall in pressure. To accom lish this result, an air gauge should be applied to the outer end 18 of the tubular element, which appli cation will unseat the valve 15. To deiiate, the tubular element should be backed away from the packing 10 until the port 9 is opened. It will be apparent that the disc arge of air through t e port may be positively controlled as to extent and duration, and that immediately upon reaching the desired reduced air pressure, as indicated by the gauge,.the discharge may be sto ped. It is to be understoodA that the fldrm of its this invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims;

Having thus claim:

1. In a pneumatic tire valve of the type described, a tubular valve casin a tubular element, two valve seats in the ore ofthe tubular element which'face toward and are equal distances from the opposite ends of the element, said tubular element being removably mounted with eitherof its ,ends projecting into the bore of the tubular" casing, and la valve in the casin for cooperatwith the valve seat in t e bore of` the described the invention, I

1n tubular element which faces toward the valve. y f

2. In a pneumatic tire valve of the type described, the combination with a tubular valve casing, and a stem carried, spring ressed valve positioned therein, of a port 1n the valve casing, and an element carrying a seat for said valve projecting into the casing and movable to open and close said` port.

3. In a pneumatic tire valve of the type described, the combination with a tubular valve casing, a pring pressed valve positioned therein, an a stem carried by the valve, of a port 1n said casing, and an element carrying an apertured valve seat for said valve projectin into the casing and movable to open an close said port, said valve stem being of a sufficient length to extend through the aperture of said valve seat and to terminate in close proximity to the outer end of the said element.

4. In a pneumatic tire valve of the type described, the combination with a tubular valve casing, and a stem carried spring ressed valve positioned therein, of a port 1n the valve casing, a tubular element, two valve seats in the bore of the tubular element which face toward and are equal distances from rthe opposite ends of the element, said element being mounted with either of its ends projecting into the bore of the tubular casing, and movablel to open and close said port while the said valve will cooperate with the valve seat which faces toward the same.

In testimony whereof, I aiix my signature.

FREDERICK MYERS. 

